package com.example.mydianping.controller;

import cn.hutool.core.util.StrUtil;
import com.example.mydianping.dto.Result;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/upload")
public class UploadController {

    @PostMapping("/blog")
    public Result uploadImage(@RequestParam("file")MultipartFile image){
        if(image.isEmpty()){
            return Result.fail("文件为空");
        }
        try {
            String originalFilename = image.getOriginalFilename();
            String newFileName = createNewFileName(originalFilename);
            String to = "E:\\share\\";//这里将图片保存到本地，真实会保存到服务器中
            image.transferTo(new File(to,newFileName));
            return Result.ok(newFileName);
        } catch (IOException e) {
            throw new RuntimeException("文件上传失败",e);
        }
    }

    private String createNewFileName(String originalFilename) {
        // 获取后缀
        String suffix = StrUtil.subAfter(originalFilename, ".", true);
        // 生成目录
        String name = UUID.randomUUID().toString();
        int hash = name.hashCode();
        int d1 = hash & 0xF;
        int d2 = (hash >> 4) & 0xF;
        // 判断目录是否存在
        String IMAGE_UPLOAD_DIR = "String  = D:\\lesson\\nginx-1.18.0\\html\\hmdp\\imgs\\;\n";
        File dir = new File(IMAGE_UPLOAD_DIR, StrUtil.format("/blogs/{}/{}", d1, d2));
        if (!dir.exists()) {
            dir.mkdirs();
        }
        // 生成文件名
        return StrUtil.format("/blogs/{}/{}/{}.{}", d1, d2, name, suffix);
    }

}
